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US 12,691,865 B2Granted
Hybrid electric vehicle and a method of controlling driving of a motor therefor
AssigneesHyundai Motor Company, Kia Corporation
InventorMin Su Kim
Life of this patent
Estimating the term…
Abstract
Proposed is a method of controlling motor driving of a hybrid electric vehicle. Sum torque of a first motor, which is directly connected to an engine, and a second motor, which is directly connected to an input end of a transmission, are determined based on request torque and torque distributed to the engine. One of a first synthetic efficiency map and a second synthetic efficiency map, to which different conversion references of the motor drive mode are set, are selectively applied to an efficiency map of the second motor, based on information about the motor drive mode applied to the second motor. The sum torque is distributed to each of the first motor and the second motor based on an efficiency map of the first motor and the efficiency map of the second motor.
Claims16
A method of controlling motor driving of a hybrid electric vehicle, the method comprising:
- determining a sum torque of a first motor, which is directly connected to an engine, and a second motor, which is directly connected to an input end of a transmission, based on a requested torque and a torque distributed to the engine;
- selectively applying one of a first synthetic efficiency map and a second synthetic efficiency map, to which different conversion references of a motor drive mode are set, to an efficiency map of the second motor, based on information about the motor drive mode applied to the second motor;
- and
- distributing the sum torque to each of the first motor and the second motor based on an efficiency map of the first motor and the efficiency map of the second motor,
- wherein the second motor is driven by a first inverter connected to first ends of windings of the second motor, a second inverter connected to second ends of the windings of the second motor, and a plurality of transfer switches having i) first ends connected between the second ends of the windings of the second motor and the second inverter and ii) second ends directly connected to each other, and
- wherein the motor drive mode includes:
- a closed end winding mode in which alternating currents corresponding to a plurality of phases are provided to the first ends of the windings of the second motor by controlling the first inverter, and the second ends of the windings of the second motor are short circuited by controlling the first inverter and the plurality of transfer switches, and
- an open end winding mode in which the plurality of transfer switches are controlled to be opened, and the alternating currents corresponding to the plurality of phases are provided to the first and second ends of the windings of the second motor by controlling the first inverter and the second inverter.
5 more elements
A hybrid electric vehicle, comprising:
- an engine;
- a first motor directly connected to the engine;
- a second motor configured to be selectively connected with the first motor based on a driving mode;
- a transmission having an input end directly connected to the second motor;
- a first control unit configured to:
- determine a sum torque of the first motor and the second motor based on a requested torque and torque distributed to the engine, and distribute the sum torque to each of the first motor and the second motor based on an efficiency map of the first motor and an efficiency map of the second motor;
- a second control unit configured to:
- control driving of the first motor based on the torque distributed to the first motor, determine a motor drive mode based on torque distributed to the second motor, and control driving of the second motor based on the determined motor drive mode;
- a first inverter connected to first ends of windings of the second motor;
- a second inverter connected to second ends of the windings of the second motor;
- and
- a plurality of transfer switches having i) first ends connected between the second ends of the windings of the second motor and the second inverter and ii) second ends directly connected to each other,
- wherein the first control unit is configured to selectively apply one of a first synthetic efficiency map and a second synthetic efficiency map, to which a conversion reference of the motor drive mode is differently set, to the efficiency map of the second motor, based on information about the motor drive mode received from the second control unit, and
- wherein the second control unit is configured to:
- when the motor drive mode is set to a closed end winding mode, control the first inverter to provide alternating current corresponding to each of a plurality of phases to the first ends of the windings of the second motor, and control the second inverter and the plurality of transfer switches to control second ends of the windings of the second motor to be short-circuited, and
- when the motor drive mode is set to an open end winding mode, control the plurality of transfer switches to be opened, and control the first inverter and the second inverter to provide alternating current corresponding to each of the plurality of phases to the first and second ends of the windings of the second motor.
13 more elements
A method of controlling motor driving of an electrified vehicle, the method comprising:
- determining a sum torque of a first motor and a second motor;
- selectively applying one of a first synthetic efficiency map and a second synthetic efficiency map, to which a conversion reference of a motor drive mode is differently set, to an efficiency map of the second motor, based on information about the motor drive mode applied to the second motor;
- and
- distributing the sum torque to each of the first motor and the second motor based on an efficiency map of the first motor and the efficiency map of the second motor,
- wherein the second motor is driven by a first inverter connected to first ends of windings of the second motor, a second inverter connected to second ends of the windings of the second motor, and a plurality of transfer switches having i) first ends connected between the second ends of the windings of the second motor and the second inverter and ii) second ends directly connected to each other, and
- wherein the motor drive mode includes:
- a closed end winding mode in which alternating currents corresponding to a plurality of phases are provided to the first ends of the windings of the second motor by controlling the first inverter, and the second ends of the windings of the second motor are short circuited by controlling the first inverter and the plurality of transfer switches, and
- an open end winding mode in which the plurality of transfer switches are controlled to be opened, and the alternating currents corresponding to the plurality of phases are provided to the first and second ends of the windings of the second motor by controlling the first inverter and the second inverter.
5 more elements
Dependencies are inferred from the claim text.